by Tina Gasperson

You may have downloaded a file with an MP4 extension and found that your audio player wouldn’t recognize the file. MP4 is a file format that can contain audio, video, or even still photos, but by default most audio players will not work with MP4. You’ll need a program that is specifically designed to convert your MP4 file to the MP3 format. Note that this only works for MP4 audio files, not those that contain video or other visual formats. MP3 is an audio-only file format. Look for a shareware or freeware program to convert your files, and follow the instructions.
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